| JVM default      | Java 9+ | Java 11+     | [OpenJDK]       |                                                              |
| Android default  | ✅      | Android 10+  | [BoringSSL]     |                                                              |
| [GraalVM]        | ✅      |              | [OpenJDK]       | Only actively tested with JDK 11, not with 8 target          |

    if (assets == null) {
      if (Build.FINGERPRINT == null) {
        throw IOException(
          "Platform applicationContext not initialized. " +
            "Possibly running Android unit test without Robolectric. " +
            "Android tests should run with Robolectric " +
            "and call OkHttp.initialize before test",
        )
      } else {
        throw IOException(

    at com.android.org.conscrypt.NativeCrypto.SSL_do_handshake(Native Method)
```

You can check a web server's configuration using [Qualys SSL Labs][qualys]. OkHttp's TLS
configuration history is [tracked here](../security/tls_configuration_history.md).

Applications expected to be installed on older Android devices should consider adopting the

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp.android.test

import android.os.StrictMode
import android.os.StrictMode.ThreadPolicy
import android.os.strictmode.Violation
import androidx.test.filters.SdkSuppress
import assertk.assertThat
import assertk.assertions.hasSize
import assertk.assertions.isEmpty

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp.android.testapp

import android.os.Bundle
import androidx.activity.ComponentActivity
import okhttp3.Call
import okhttp3.Callback
import okhttp3.HttpUrl.Companion.toHttpUrl
import okhttp3.OkHttpClient
import okhttp3.Request
import okhttp3.Response

Android
=======

For details on developing Go for Android, see the documentation in the
mobile subrepository:

	https://github.com/golang/mobile

To run the standard library tests, enable Cgo and use an appropriate
C compiler from the Android NDK. For example,

	CGO_ENABLED=1 \
	GOOS=android \
	GOARCH=arm64 \
	CC_FOR_TARGET=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android21-clang \
	./all.bash

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.platform.android

import android.annotation.SuppressLint
import android.net.ssl.SSLSockets
import android.os.Build
import java.io.IOException
import java.lang.IllegalArgumentException
import javax.net.ssl.SSLSocket
import okhttp3.Protocol

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.platform.android

import android.util.Log
import java.util.concurrent.CopyOnWriteArraySet
import java.util.logging.Handler
import java.util.logging.Level
import java.util.logging.LogRecord
import java.util.logging.Logger

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
          xmlns:tools="http://schemas.android.com/tools" package="okhttp.android.testapp">

  <uses-permission android:name="android.permission.INTERNET" />

  <application
    android:allowBackup="true"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:name=".TestApplication"
  >
    <activity
      android:name=".MainActivity"

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="okhttp.android.regression">
  <uses-permission android:name="android.permission.INTERNET" />

  <!-- For HttpEngine -->
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />